'''message = "hello word"
print(message)
message = "second message"
print(message)
print(message.title())#首字母大写
print(message.upper())
print(message.lower())'''

first_name = "zhang"
second_name = "san"
full_name = f"{first_name} {second_name}"
print(full_name)
print(f"hello,{full_name.title()}")
message = f"hello,{full_name.title()}"
print(message)